If you had gained 6 lbs of muscle and lost 7 in one month, I'm very certain you'd know about it, unless you're extremely deluded. It's harder to tell when you're carrying a significant amount of extra weight, but still, that's a lot. Your measurements at the very least should've seen an inch or two decreasing pretty well everywhere.
I read your thread, but I'm still not terribly clear on what exactly you're doing in terms of diet and nutrition. Rather than make you type it all up here and then make me type up all sorts of junk, I'll say 3 things:
1) Not all calories are equal
2) In order to lose fat you must create a calorie deficit
3) Fat loss is not always linear
Now, having said those things, I feel the need to explain to you that at 100 lbs over your ideal weight, even if you are gaining muscle at a prodigious "beginner grace period" rate, you should still be seeing consistent results on your weigh-ins, if you're doing everything right.
Read
this thread, and follow links. If you feel like you already know all that junk, skip down to the Fat Loss Troubleshoot link. If you can't find anything applicable in there, well, then I'm gonna ask you to break it down in detail. I'm pretty certain you're doing something wrong. Almost anyone with a hundred lbs to lose should be able to drop it like horses make dookie when first starting out.
To give you an example, when I was at 280 and I decided to lose weight, I lost 60 lbs or so over 3.5 months at one point, and I was actually trying to slow down after the first month.